I'm working on a project that uses an 18f6720, and I'm writing the code in
Microchip C18. It's talking to both SPI and I2C devices. I just do the
appropriate "open" (initializing the SPP) prior to talking to the
particular device. I then do a close. The SPI devices ignore the I2C data
since their chip select lines are not low. The I2C devices ignore the SPI
data since SPI never sends a valid I2C start. It's worked so far!

Harold

> All this talk about SPI devices, has me thinking about an interesting
> problem I have, that perhaps someone can suggest an easy solution for.
>
> I am not too familiar with SPI, I am just learning about it, however, I am
> pretty familiar with I2C at this point.  I have a circuit that has a
> PIC18F252 as an I2C master, and it talks to several I2C slave devices.  I
> have recently been presented with an SPI device that I need to interface
> to
> the same I2C master PIC.  The SSP hardware on the PIC is pretty much I2C
> or
> SPI, and not both.  Short of switching everything to SPI, what are my
> options?  Is there some kind of I2C to SPI converter out there?  I have
> poked around, and there doesn't appear to be a PIC with more than one SSP
> on
> it...perhaps there is one I am missing?
>
> Thanks,
>
> - Ted
>
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